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PC87332VLJ-PC87332VLJ-5
(Super I/O III Premium) 3.3V/5V Super I/O with Floppy Disk Controller, Dual UARTs, IEEE1284 Parallel Port and IDE Inter
TL/C/11930
PC87332VLJ
(3.3V/5V)
and
PC87332VLJ-5
(5V)
(SuperI/O
III
Premium
Green)
Floppy
Disk
Controller,
Dual
UARTs,
IEEE1284
Parallel
Port,
and
IDE
Interface
PRELIMINARY
May 1995
PC87332VLJ (3.3V/5V) and PC87332VLJ-5 (5V)
(SuperI/OTM III Premium Green)
Floppy Disk Controller, Dual UARTs, IEEE1284
Parallel Port, and IDE Interface
General Description
The PC87332VLJ and PC87332VLJ-5are single chip solu-
tionsfor most commonly usedI/O peripheralsin ISA, EISA
and MicroChannelÉ based computers.It incorporatesa
Floppy Disk Controller (FDC),twofull featured UARTs,an
IEEE 1284 compatible parallel portandallthe necessary
controllogicforanIDE interface.Standard PC-ATÉ address
decodingforallthe peripheralsandasetof configuration
registersare also implementedin this highly integrated
memberofthe SuperI/O family. Advanced power manage-
ment featuresand mixed voltage operationinthe VLJver-
sion make thePC87332 chipsan idealfor low-power and/or
portable personal computer applications.
The PC87332 FDC usesa high performance digital data
separator eliminatingthe needforany external filter compo-
nents.Itis fully compatible withthe PC8477 and incorpo-
ratesa supersetof DP8473, NEC mPD765 andN82077 flop- disk controller functions.All popular 5.25×and 3.5× flop- drives, includingthe 2.88MB 3.5× floppy drive,are sup-
ported.In addition, automatic media senseand2 Mbps tape
drive supportare providedbythe FDC.
Thetwo UARTsare fully NS16450and NS16550 compati-
ble. Both ports support MIDIbaud rates. (Continued)
Features Floppy Disk Controller: Software compatible withthe DP8473,the 765A and
the N82077 16-byte FIFO (disabledby default) Burstand Non-Burst modes Perpendicular Recording drive support New high-performance internal digital data separator
(no external filter components required) Low-power CMOS with enhanced power-down mode Automatic media-sense support Supportsfast2 Mbpsand standard1 Mbps/
500 kbps/250 kbps tape drives Bidirectional Parallel Port: Enhanced Parallel Port (EPP) compatible Extended Capabilities Port (ECP) compatible, includ-
ing level2 support Bidirectional under either softwareor hardware
control Abilityto multiplex FDC signalson parallel port pins
allowsuseofan external Floppy Disk Drive (FDD) Includes protection circuitto prevent damagetothe
parallel port whena connected printeris poweredupis operatedata higher voltage (Continued)
Block Diagram
TL/C/11930–1
TRI-STATEÉ isaregistered trademarkof National SemiconductorCorporation.
SuperI/OTMisa trademark ofNationalSemiconductor Corporation.
IBMÉ, MicroChannelÉ,PC-ATÉand PS/2Éareregistered trademarks ofInternational BusinessMachinesCorporation.
C1995National SemiconductorCorporation RRD-B30M65/PrintedinU.S.A.
